Here’s an interesting SST proxy from the Gulf of Mexico that I meant to report on last October, but is actually more timely now given our recent discussion of hurricanes. When I corresponded with Lloyd Keigwin around the time of the Juckes submission, he mentioned a “beautiful” unpublished high resolution core from Poore in the […]
Category Archives: Ocean sediment
It’s a dangerous practice to let your eye get teased into visual comparisons, but I was struck by a comparison between the G Bulloides series from the Arabian Sea (which is an upwelling proxy) and Stott’s Warm Pool SST proxies.
The Team (at both realclimate and NOAA) have stated in the strongest possible terms that the Holocene Optimum was restricted to summer in the NH extratropics. Reviewing their positions, realclimate here The [Holocene Optimum] is a somewhat outdated term used to refer to a sub-interval of the Holocene period from 5000-7000 years ago during which […]
You may recall Hansen’s strange splice of modern instrumental records with a Mg/Ca SST proxy ending in 4320 BP based on a partially dissolved core.’ A couple of months ago, I mentioned a new paper by Newton et al (including L Stott) with a high Warm Pool MWP and briefly discussed Netwon’s presentation at AGU […]
I’ve written on several occasions about Juckes’ use of cold water G Bulloides as a supposed temperature proxy (following Moberg’s equally indefensible use of this proxy.) It has come to my attention that a leading specialist, David Black of the University of Akron, had already issued a scathing denunciation of Juckes’ use of G Bulloides […]
Proxy attention seems to have migrated away from things like bristlecones (still waiting for Hughes’ 2002 Sheep Mountain update) to the Antarctic Peninsula ice shelves, with the major break-ups of the Larsen 1-A and 1-B ice shelves. An interesting illustration of NH-SH asymmetry is that the latitude of the Larsen 1-A ice shelf is 64 […]
In my search for high-resolution ocean sediment records, I stumbled across an interesting 1995 article by Domack et al (Domack of the Larsen Ice Shelf) discussing cores on the west side of the Antarctic Peninsula which were dated over the last 2000 years.
Lloyd Keigwin’s Sargasso Sea study was done using 1 cm core intervals; the Arabian Sea RC2730 percentage G bulloides was calculated using 2 mm core intervals (although slower sedimentation meant that the time intervals were mitigated somewhat.) see http://www.climateaudit.org/?p=898 . G bulloides percentage is interesting a measure of upwelling, but isn’t a proxy for SST. […]
Keigwin’s Sargasso Sea temperature reconstruction, used in Moberg et al 2005, was de-selected by Juckes in what he represented to be the Moberg CVM composite and in making the Union composite (although he managed to use Tornetrask twice ?!? under different names). Although he de-selected the Sargasso Sea temperature reconstruction, he used Moberg’s Arabian Sea […]
Hot off the press this week is a study on foraminera over the last millennium in the Indo-Pacific Warm Pool – something that you’d think would be relevant to Hansen’s attempts to splice modern instrumental records to core tops ending in the Holocene Optimum. Newton et al 2006 have the following abstract: